Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (2): 35-39,44.

• Mechanical Engineering • Previous Articles     Next Articles

Modeling and Numerical Calculation of Asymmetrical Giant Magneto-Impedance Effect of Ribbons

Chai Xiu-li1  Zeng De-chang1  Liu Gui-xiong2  Yu Hong-ya1  Zhong Xi-chun1  Liu Wen-jie1   

  1. 1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-01-10 Revised:2008-08-08 Online:2009-02-25 Published:2009-02-25
  • Contact: 曾德长（1963-），男，教授，博士生导师，主要从事磁性材料与器件、材料表面科学与工程研究．E—mail：medczeng@scut．edu．cn E-mail:chaixiuli@sohu．com
  • About author:柴秀丽（1980-），女，讲师，博士，现任职于河南大学计算机与信息工程学院，主要从事新型智能传感器研究．
  • Supported by:

    国家自然科学基金资助项目（U0734001,50874050）;广东省科技计划项目（2004810301009,2006A11002001,20078010600007,20078010600043）;广东省自然科学基金资助项目（05300306）;广州市科技计划项目（200523-D2061,200622-130131,200622一D0121）

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Abstract:

Although the asymmetric giant magneto-impedance effect （AGMIE） is of high-sensitivity magnetic re- sponse, its sensing modeling in a ribbon with inner amorphous and outer crystalline layers still remains a complicated issue. To solve the problem, this paper establishes a model of AGMIE. In this model, the coupling between the crystalline and amorphous layers is described using the effective bias field, the diagonal and off-diagonal voltages are calculated by simultaneously solving Landau-Lifshitz kinetic equations and linear Maxwell equations, and the positive and negative working spaces of the magnetic field as well as the sensitivity of the sensor at various crystal- line layer thicknesses are thus deduced. The calculated results basically accord with the experimental ones, indica- ting that the proposed model is credible and effective.

Key words: asymmetrical giant magneto-impedance effect, diagonal voltage, off-diagonal voltage, Landau-Lifshitz kinetic equation, sensing modeling